A scientist is studying the solid, rocky crustal portion of the earth. The focus of his/her study is on the

A. biosphere

B. hydrosphere

C. atmosphere

D. lithosphere

A student sets up an experiment with two groups of bacteria. One group is exposed to the normal amount of mercury found in the environment. The other group gets a larger dose.

Can you describe some of the paths carbon takes through the environment?

T or F? earth has an iron mantle

There is observable change from each kind of organism into some other kind. True or False?

Explain which parts of a plant are often preserved as a fossil

Which statement is true for both plants and animals?

A young couple went to see a genetic counselor because each had a sibling affected with cystic fibrosis. (recessive disease, neither member of the couple is affected.

The best term to describe the general process by which microorganisms cause diseases is known as the best term to describe the general process by which microorganisms cause diseases is known as pathogenesis. infection.

Imagine that a doctor is culturing two types of cells: one from a malignant melanoma and one from a normal skin sample. How would you expect these two cell populations to differ?

The strength of an earthquake can be measured by a scale, while the after effects or damage from an earthquake is measured by a scale.